Product Overview

Orifice plate flowmeter is a differential pressure generating device for flow measurement, also named differential pressure flowmeter. It consists of primary element (throttling component) and secondary equipment (differential pressure transmitter & flow indicator). Widely adopted for flow measurement of gas, steam and liquid, it owns advantages of simple structure, easy maintenance and stable performance.

Working principle: The bore diameter of throttling part is smaller than pipe inner diameter. When fluid flows through the throttling element, flow cross section shrinks abruptly and flow velocity rises. Static pressure drops behind the throttling part, forming a static pressure difference between upstream and downstream sides. There is a definite mathematical relationship between pressure difference and fluid flow rate. The differential pressure before and after the throttling piece is detected by differential pressure transmitter (or differential pressure gauge) to realize flow measurement.

Throttling assemblies of orifice flowmeter cover ring chamber orifice plate, nozzle and other types. Matched with differential pressure transmitters, they measure flow of liquid, steam and gas, and are extensively used in petroleum, chemical, metallurgy, electric power, light industry and other industries.

Intelligent throttling device (orifice plate flowmeter) integrates flow, temperature and pressure detection, and supports automatic temperature & pressure compensation. Adopting microcomputer and low-power technology, it features powerful functions, compact structure, simple operation and convenient use.

Features of Standard Orifice Plate Flowmeter

• The throttling assembly is easy to reproduce, simple, firm, stable, long service life and low cost

• Manufactured and calculated in accordance with international standards

• Wide application range, suitable for all single-phase fluids and partial multi-phase mixtures

• Standard throttling device can be put into service without actual flow calibration

• Integrated orifice plate integrates three-valve manifold with differential pressure/multi-parameter transmitter. Only assemble accessories after on-site installation of orifice plate, greatly simplifying construction

Features of Intelligent Orifice Plate Flowmeter

• Equipped with high-precision multi-parameter transmitter

• High measuring accuracy and complete self-diagnosis function

• Programmable turndown ratio

• Simultaneous display of total flow, instantaneous flow, pressure and temperature

• Online dynamic full compensation, self-diagnosis and self-programmable range

• Multiple communication interfaces available

• Excellent long-term stability

• Wide turndown ratio over 10:1

Technical Specifications of Intelligent Transmitter

• Transmitter accuracy: ±0.075%

• Stability: Better than 0.1%FS per year

• Max static pressure: 25MPa

• No calibration required for 5 years of continuous operation

• Negligible influence from temperature and static pressure

• Strong overpressure resistance

General Technical Parameters